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<?php
/**
 * Options Management Administration Screen.
 *
 * If accessed directly in a browser this page shows a list of all saved options
 * along with editable fields for their values. Serialized data is not supported
 * and there is no way to remove options via this page. It is not linked to from
 * anywhere else in the admin.
 *
 * This file is also the target of the forms in core and custom options pages
 * that use the Settings API. In this case it saves the new option values
 * and returns the user to their page of origin.
 *
 * @package WordPress
 * @subpackage Administration
 */

/** WordPress Administration Bootstrap */
require_once __DIR__ . '/admin.php';

// Used in the HTML title tag.
$title       = __( 'Settings' );
$this_file   = 'options.php';
$parent_file = 'options-general.php';

wp_reset_vars( array( 'action', 'option_page' ) );

$capability = 'manage_options';

// This is for back compat and will eventually be removed.
if ( empty( $option_page ) ) {
	$option_page = 'options';
} else {

/**
	 * Filters the capability required when using the Settings API.
	 *
	 * By default, the options groups for all registered settings require the manage_options capability.
	 * This filter is required to change the capability required for a certain options page.
	 *
	 * @since 3.2.0
	 *
	 * @param string $capability The capability used for the page, which is manage_options by default.
	 */
	$capability = apply_filters( "option_page_capability_{$option_page}", $capability );
}

if ( ! current_user_can( $capability ) ) {
	wp_die(
		'<h1>' . __( 'You need a higher level of permission.' ) . '</h1>' .
		'<p>' . __( 'Sorry, you are not allowed to manage options for this site.' ) . '</p>',
		403
	);
}

// Handle admin email change requests.
if ( ! empty( $_GET['adminhash'] ) ) {
	$new_admin_details = get_option( 'adminhash' );
	$redirect          = 'options-general.php?updated=false';

if ( is_array( $new_admin_details )
		&& hash_equals( $new_admin_details['hash'], $_GET['adminhash'] )
		&& ! empty( $new_admin_details['newemail'] )
	) {
		update_option( 'admin_email', $new_admin_details['newemail'] );
		delete_option( 'adminhash' );
		delete_option( 'new_admin_email' );
		$redirect = 'options-general.php?updated=true';
	}

wp_redirect( admin_url( $redirect ) );
	exit;
} elseif ( ! empty( $_GET['dismiss'] ) && 'new_admin_email' === $_GET['dismiss'] ) {
	check_admin_referer( 'dismiss-' . get_current_blog_id() . '-new_admin_email' );
	delete_option( 'adminhash' );
	delete_option( 'new_admin_email' );
	wp_redirect( admin_url( 'options-general.php?updated=true' ) );
	exit;
}

if ( is_multisite() && ! current_user_can( 'manage_network_options' ) && 'update' !== $action ) {
	wp_die(
		'<h1>' . __( 'You need a higher level of permission.' ) . '</h1>' .
		'<p>' . __( 'Sorry, you are not allowed to delete these items.' ) . '</p>',
		403
	);
}

$allowed_options            = array(
	'general'    => array(
		'blogname',
		'blogdescription',
		'site_icon',
		'gmt_offset',
		'date_format',
		'time_format',
		'start_of_week',
		'timezone_string',
		'WPLANG',
		'new_admin_email',
	),
	'discussion' => array(
		'default_pingback_flag',
		'default_ping_status',
		'default_comment_status',
		'comments_notify',
		'moderation_notify',
		'comment_moderation',
		'require_name_email',
		'comment_previously_approved',
		'comment_max_links',
		'moderation_keys',
		'disallowed_keys',
		'show_avatars',
		'avatar_rating',
		'avatar_default',
		'close_comments_for_old_posts',
		'close_comments_days_old',
		'thread_comments',
		'thread_comments_depth',
		'page_comments',
		'comments_per_page',
		'default_comments_page',
		'comment_order',
		'comment_registration',
		'show_comments_cookies_opt_in',
	),
	'media'      => array(
		'thumbnail_size_w',
		'thumbnail_size_h',
		'thumbnail_crop',
		'medium_size_w',
		'medium_size_h',
		'large_size_w',
		'large_size_h',
		'image_default_size',
		'image_default_align',
		'image_default_link_type',
	),
	'reading'    => array(
		'posts_per_page',
		'posts_per_rss',
		'rss_use_excerpt',
		'show_on_front',
		'page_on_front',
		'page_for_posts',
		'blog_public',
	),
	'writing'    => array(
		'default_category',
		'default_email_category',
		'default_link_category',
		'default_post_format',
	),
);
$allowed_options['misc']    = array();
$allowed_options['options'] = array();
$allowed_options['privacy'] = array();

$mail_options = array( 'mailserver_url', 'mailserver_port', 'mailserver_login', 'mailserver_pass' );

if ( ! in_array( get_option( 'blog_charset' ), array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ), true ) ) {
	$allowed_options['reading'][] = 'blog_charset';
}

if ( get_site_option( 'initial_db_version' ) < 32453 ) {
	$allowed_options['writing'][] = 'use_smilies';
	$allowed_options['writing'][] = 'use_balanceTags';
}

if ( ! is_multisite() ) {
	if ( ! defined( 'WP_SITEURL' ) ) {
		$allowed_options['general'][] = 'siteurl';
	}
	if ( ! defined( 'WP_HOME' ) ) {
		$allowed_options['general'][] = 'home';
	}

$allowed_options['general'][] = 'users_can_register';
	$allowed_options['general'][] = 'default_role';

$allowed_options['writing']   = array_merge( $allowed_options['writing'], $mail_options );
	$allowed_options['writing'][] = 'ping_sites';

$allowed_options['media'][] = 'uploads_use_yearmonth_folders';

/*
	 * If upload_url_path is not the default (empty),
	 * or upload_path is not the default ('wp-content/uploads' or empty),
	 * they can be edited, otherwise they're locked.
	 */
	if ( get_option( 'upload_url_path' )
		|| get_option( 'upload_path' ) && 'wp-content/uploads' !== get_option( 'upload_path' )
	) {
		$allowed_options['media'][] = 'upload_path';
		$allowed_options['media'][] = 'upload_url_path';
	}
} else {
	/**
	 * Filters whether the post-by-email functionality is enabled.
	 *
	 * @since 3.0.0
	 *
	 * @param bool $enabled Whether post-by-email configuration is enabled. Default true.
	 */
	if ( apply_filters( 'enable_post_by_email_configuration', true ) ) {
		$allowed_options['writing'] = array_merge( $allowed_options['writing'], $mail_options );
	}
}

/**
 * Filters the allowed options list.
 *
 * @since 2.7.0
 * @deprecated 5.5.0 Use {@see 'allowed_options'} instead.
 *
 * @param array $allowed_options The allowed options list.
 */
$allowed_options = apply_filters_deprecated(
	'whitelist_options',
	array( $allowed_options ),
	'5.5.0',
	'allowed_options',
	__( 'Please consider writing more inclusive code.' )
);

/**
 * Filters the allowed options list.
 *
 * @since 5.5.0
 *
 * @param array $allowed_options The allowed options list.
 */
$allowed_options = apply_filters( 'allowed_options', $allowed_options );

if ( 'update' === $action ) { // We are saving settings sent from a settings page.
	if ( 'options' === $option_page && ! isset( $_POST['option_page'] ) ) { // This is for back compat and will eventually be removed.
		$unregistered = true;
		check_admin_referer( 'update-options' );
	} else {
		$unregistered = false;
		check_admin_referer( $option_page . '-options' );
	}

if ( ! isset( $allowed_options[ $option_page ] ) ) {
		wp_die(
			sprintf(
				/* translators: %s: The options page name. */
				__( '<strong>Error:</strong> The %s options page is not in the allowed options list.' ),
				'<code>' . esc_html( $option_page ) . '</code>'
			)
		);
	}

if ( 'options' === $option_page ) {
		if ( is_multisite() && ! current_user_can( 'manage_network_options' ) ) {
			wp_die( __( 'Sorry, you are not allowed to modify unregistered settings for this site.' ) );
		}
		$options = isset( $_POST['page_options'] ) ? explode( ',', wp_unslash( $_POST['page_options'] ) ) : null;
	} else {
		$options = $allowed_options[ $option_page ];
	}

if ( 'general' === $option_page ) {
		// Handle custom date/time formats.
		if ( ! empty( $_POST['date_format'] ) && isset( $_POST['date_format_custom'] )
			&& '\c\u\s\t\o\m' === wp_unslash( $_POST['date_format'] )
		) {
			$_POST['date_format'] = $_POST['date_format_custom'];
		}

if ( ! empty( $_POST['time_format'] ) && isset( $_POST['time_format_custom'] )
			&& '\c\u\s\t\o\m' === wp_unslash( $_POST['time_format'] )
		) {
			$_POST['time_format'] = $_POST['time_format_custom'];
		}